Improvement in vises



fx1) A at the end ot' the long arm of the lever E.

,auch site aan com. m

- ISAIAH BYRD AND TURNER BYRD, JR., OF CALVIN. TOWNSHIP,

MICHIGAN.

Letters Patent No. 110,198, datedDecember 20, 1870 antedated December 9;1'870.

IMPROVEMENT IN 'VISES.

*x The Schedule referred to in these Letters Patent and making part ofthe same.

To whom it Amay concern Be it known that we, ISAIAH BYRD and TURNERBYRD, Jr., ot Calvin Township, in the county of Cass and State ofMichigan, have invented a new and useful Imprcy'ement in Means forOperating Vises; and we do declare that the followingr is a true andaccurate description thereof, reference being had to the accompanyingdrawing and to the letters of refercnce marked thereon and being a partof this specification.

rlhe nature of our invention relates to-an` improvement in devices foroperating vises, and consists in a peculiar construction and arrangementof levers. and a treadle in the frame-work of a bench, in such a mannerthat great force may be instantly exerted on the movable jaw of a vise,and as quickly released.

Inthe drawing, which is a perspective View f a work-bench lying on itsside, taken from the under side, and showing my improvement attached* Arepresents the table of a work-bench mounted on legs B.

O represents a stationary jaw of a smiths vise securely attached to thebench, and v C', the movable jaw, which is connected to the sta`tional-y jaw by a bar, a, passing through a mortise in the lower end ofeach, and secured ltherein by proper pins. Ihe bar is perforated atintervals to allow the movable leg to be adjusted to or from the other.

' Dis a spindle attached to the loose jaw, passing through the other andthe leg of the bench, and pivotcd at the other end toa lever, E, at b,Said lever being pivoted to a cross-bar under the front end of thetable. F is another lever, the short arln of which ixnpinges F, led overa pulley, K, at the top o f the ratchetstandard, and has its other endattached to the treadle.

L is a spiral springcoiled about the spindle between the jaws, t0 throwthem apart when not in use. y It wilhreadily be seen that 'thecombination of the levers with the treadle enables the operator to bringgreat power to bear on the movable jaw of the vise, which will hold thearticle placed therein so long Yas the trcadle engages with the ratchet.

WVhen a bulky or thick article is to be held` in the vise, requiring thejaws to be drawn far apart, the treadle will be drawn up under the table4above the ratchet. v

In order iu such a case' to bring the treadle into use, we attachthereto a hand-levend', curved as shown, and pivoted in a slot therein,and in rear of its fulcrum, which is also placed in the slot, so that,when the treadle proper is under the table, the curved lever I may bepressed down by hand into engagement with the ratchet.

' For wood-workers, the vise-jaws may be removed and replaced by asingle wooden movable jaw pivoted' manner described. l

Unless great power is required, all or near-ly all the partsl may be ofwood, and in any case, should a part be broken, it may be readily andcheaply replacedl' What we claim as ourinvention, and desire to secureby Letters Patent, is-

1. The trcadle I, when provided with a supplementary lever, I, pivotedthereto, and operating in the manner described and for the purpose setforth.

2. The construction and arrangement ofthe treadle I, rope J, levers Eand F, and spindle l), with relation It is pivotcd in a slottedcross-bar,-G, under the to each other and the ratchet H, and anysuitable table, which serves as a guide for both levers. vise, as andfor the purpose set forth.

ll is a ratchct-staiulard, depending from the table ISAIAH BYRD. inproximity to the vise. TURNER BYRD, JR.

With the ratchet engages a trcadle, I,. pivoted in Witnesses: the backpart of the tableframc. J AMES HYBERT,

A cord, J, is attached to the long arm of the'lcver PHINEAS GREGGON.

